Terahertz wavefront control by graphene metasurface

Takumi Yatooshi, Atsushi Ishikawa, Kenji Tsuruta

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We propose and numerically investigate a tunable metasurface made of an array of graphene ribbons to dynamically control terahertz (THz) wavefront. The metasurface consists of graphene micro ribbons on a silver mirror with a SiO2 gap layer. The graphene ribbons are designed to exhibit localized plasmon resonances depending on their Fermi levels to introduce abrupt phase shifts along the metasurface. With interference of the Fabry-Perot resonances in the SiO2 layer, phase shift through the system is largely accumulated, covering up to 2jt range for full control of the THz wavefront. Numerical simulations prove that wide-angle reflected THz beam steering from -53° to +53° with a high reflection efficiency as high as 60% is achieved at 5 THz while the propagation direction of THz beam could be switched within 0.6 ps.

Original languageEnglish
Title of host publicationLight-Matter Phenomena - From Atoms to Complex Structures
EditorsDimitry Budker, Vivian Ferry, Joshua Caldwell, Carlos Meriles, Doekele Stavenga, Jill Millstone, Milos Nesladek, Carlos Silva, Ming Lee Tang, Cordt Zollfrank, Michael Bartl, Silke Christiansen, Noel Giebink, Stephane Kena-Cohen, Fedor Jelezko, Gennady Shvets, Natalie Stingelin, Joel Yang, Stephane Larouche
PublisherMaterials Research Society
Pages37-42
Number of pages6
ISBN (Electronic)9781510826427
DOIs
Publication statusPublished - 2015
Event2015 MRS Spring Meeting - San Francisco, United States
Duration: Apr 6 2015Apr 10 2015

Publication series

NameMaterials Research Society Symposium Proceedings
Volume1788
ISSN (Print)0272-9172

Conference

Conference2015 MRS Spring Meeting
CountryUnited States
CitySan Francisco
Period4/6/154/10/15

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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  • Cite this

    Yatooshi, T., Ishikawa, A., & Tsuruta, K. (2015). Terahertz wavefront control by graphene metasurface. In D. Budker, V. Ferry, J. Caldwell, C. Meriles, D. Stavenga, J. Millstone, M. Nesladek, C. Silva, M. L. Tang, C. Zollfrank, M. Bartl, S. Christiansen, N. Giebink, S. Kena-Cohen, F. Jelezko, G. Shvets, N. Stingelin, J. Yang, & S. Larouche (Eds.), Light-Matter Phenomena - From Atoms to Complex Structures (pp. 37-42). (Materials Research Society Symposium Proceedings; Vol. 1788). Materials Research Society. https://doi.org/10.1557/opl.2015.730